Solution: The potential difference across $4 \Omega$ resistor is potential drop by the $4 \Omega$ resistor.$V=I R=1 \times 4=4 V$The power dissipated in $4 \Omega$ resistor$$P=I^{2} R=1^{2} \times...

Solution: (a) Since, two $8 \Omega$ resistors are in parallel, then their effective resistance $R_{p}$ is given by$$\begin{aligned}\frac{1}{R_{p}}...

Solution: According to the Joules heating effect, the amount of heat that a resistor produces is For the given resistor, the voltage is directly proportional to the square of the current.Resistance...

Solution: Create a circuit with three resistors (R1, R2, and R3) connected in parallel, as shown in the diagram below: Take a reading of the potential difference between three resistors that are...

Solution: To construct the circuit, connect three resistors R1, R2, and R3 in series.Make use of an ammeter to observe the changes that have occurred in the current flow.Remove R1 and measure the...

Answer: The ability of a conductor to resist the flow of electric current is an inherent property of the conductor itself. Each material's resistance is distinct from the others. Resistance is...

Answer: Ohm’s law states that at constant temperature potential difference (voltage) across an ideal conductor is proportional to the current through it. V/I = R Ohm's law is being checked for...

Answer: a) In a series configuration, the resistance of the bulbs is three times greater than the resistance of a single bulb. As a result, when compared to the current in each bulb in the parallel...

Solution: In a parallel circuit, the potential difference does not become divided. As a result, when bulb one is fused, the glowing of the other bulbs will not be affected. 3 Amperes are being...

Solution: Evaluating the value, R= V/I = 4.5V/3A= 1.5Ω As we know that, substituting the value of parameters in P= I2R, we get = (3A)2 x 1.5 Ω = 13.5 W

Answer: Parallel wiring is commonly used in domestic wiring because it ensures that the potential difference between each electrical appliance is the same across the board.

Solution: Given: I= 1 A, V= 5 V 1) Let R be the resistance of the electric lamp. In series total resistance = 5 + R I = v/r 1 =  10/5+R R = 5 ohm 2) V across Lamp + conductor = 10 V V acoess Lamp =...

Solution: Electrical energy is a term that is used to refer to energy that has been converted from electric potential energy when it is used informally. Commercial unit of electrical energy is...

Answer: The resistivity of a conductor is defined as the property of the conductor that prevents the flow of electric current. The resistance of a particular material is one-of-a-kind. Resistance is...

Answer: The resistance of fuse wire is much higher than that of the main wiring. The electric current increases by a significant amount when this occurs. The fuse wire melts, causing the circuit to...

Solution: The circuit diagram is: The following equation can be used to calculate the total resistance of a parallel combination of 40 resistors: $\frac{1}{R}=\frac{1}{4}+\frac{1}{4}=\frac{1}{2}$$R...

Answer: The resistance of an ammeter should be low because the ammeter is connected in series with the circuit, and if the resistance of the circuit is too high, no current will flow through it.

Solution: We know that Current $P = I ^{2} R$ Evaluating the value,$$18 W = l ^{2} \times 2 \Omega \I ^{2}=18 W / 2 \Omega \ $$ =9 A I =3 AThis is the maximum current that can flow through the three...

Solution: Specifically, the ammeter has been connected in parallel with the voltmeter, which is not the correct way to connect the two metres. The ammeter should be connected in series with the...

Solution: The answer is (a) volt-ampere The apparent power of an electrical circuit is measured in volt-amperes (VA), which is the unit of measurement. A watt-second (also spelled watt-second,...

Solution: The answer is (b) same current flowing through them when connected in series When using a series combination, the current is not divided into branches because the resistor receives a...

Solution: The answer is (d) 5 A We know, P=V x I Substituting , 1000 w = 220v x I I =1000w/220v = 4.54 A = 5 A

Solution: Answer is (c) 20 J Equivalent resistance of the circuit is R = 4+2 = 6Ω current, I= V/R =  6/6= 1A the heat dissipated by 4-ohm resistor is, H = I2Rt = 20J

Solution: Answer is (c) Brightness of bulb B will be more than that of A Due to the fact that the bulbs are connected in parallel, their combined resistance will be less than the arithmetic sum of...

Solution: Answer is (c) the shape of the resistor is changed We will be re-arranging the terms we will receive, =A/RlAs a result, the resistivity of the material will be determined by its area and...

Solution: Answer is (c) 300 % The amount of heat generated by a resistor is proportional to the square of the current flowing through it. As a result, when the current is doubled, the dissipation of...

Solution: The answer is (c) R3 > R2 > R1 Resistance is inversely proportional to the amount of current flowing through it. Because the highest resistance will result in the least amount of current...

Solution: Answer is (c) 2A Explanation: We are well aware of this. R is equal to (L/A). The resistance of a wire of length L is denoted byThe area of the cross-section is denoted by the letter A.The...

Solution: The answer is a) Explanation: Electric potential is the work done per unit charge.  Electric Potential=Charge Work Done​ Again, Charge=Current×Time...

Solution: Answer is (b) 1/25 Ω Explanation: When resistors are connected in series, the resistance is reduced to a minimum. 1/R = 5 + 5 + 5 +5 +5= 25 Ω R=1/25Ω

Solution: The answer is (a) (i) Explanation: The positive terminal of the next cell is direct across from the negative terminal of the previous cell in this arrangement.

Solution: The answer is (b) (ii) Explanation: For current to flow, an electrical circuit must be closed. An open circuit can result from improperly connected components. An ammeter measures the...

Solution: Answer is (a) 1020 Given $: I =1 A , t =16 s , e =1.6 \times 10^{-19} C$ Step 1: The filament draws current from the power supply. $I =\frac{ Q }{ t }=\frac{ Ne }{ t } \quad ($ Since $Q =...

Solution: The answer is (d) nature of the material The resistivity of a material is an inherent property of the material. As an intensive property, it does not scale with the system's size, even if...

Solution: The answer is (c) maximum in case(ii) In this example, two transistors are connected in series. Because they are connected in parallel, the total resistance in figure (iii) will be less...

Solution: The answer is (d) the same in all the cases Because there are no modifications to any of the circuits, the current in all of the circuits will be the same.