Practice 1

20 Animated Videos | 20 Structured Questions.

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1

Find the total power dissipation in each case.

1 Min | 1MB #Intermediate
2

Find the ratio of rate of the heat dissipation in two wires.

1 Min | 1MB #Intermediate
3

Find the efficiency of given water heater.

1 Min | 1MB #Intermediate
4

Calculate the resistance of the heater.

1 Min | 1MB #Intermediate
5

Determine the no. of cells required to raise the temp. by same amount.

2 Min | 1MB #Intermediate
6

What will be efficiency of cell if the external resistance is increased by ten times?

2 Min | 1MB #Intermediate
7

Find the power dissipated in the marked resistor.

3 Min | 2MB #Intermediate
8

Find the rate of heat produced in the 4 W resistor.

3 Min | 2MB #Intermediate
9

What resistance must be connected in series with the bulb so that it delivers 500 W?

2 Min | 1MB #Intermediate
10

Find the max. no. of bulbs that can be illuminated so that voltage across none of the lamps drops below 240 V.

1 Min | 1MB #Intermediate
11

Find the max. no. of bulbs that can be safely connected in parallel to given circuit.

1 Min | 1MB #Intermediate
12

Find the max. power the circuit can dissipate and max. safe value of E.

2 Min | 1MB #Intermediate
13

Find 'R' to deliver maximum power to the network.

2 Min | 1MB #Intermediate
14

Find the value of 'R' for which the power delivered to resistor will be maximum.

1 Min | 1MB #Intermediate
15

Find the time when current in the resistor is zero.

1 Min | 1MB #Intermediate
16

Calculate the leakage current at the instant t = 17.7 s.

2 Min | 2MB #Intermediate
17

Plot the variation of voltage across the resistor.

1 Min | 1MB #Intermediate
18

What is the ratio of time constant during charging and discharging of the capacitor ?

1 Min | 1MB #Intermediate
19

Find the energy stored in the capacitor.

1 Min | 1MB #Intermediate
20

Find the potential difference between the points A and B in the steady state.

1 Min | 1MB #Intermediate
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