Class 10th Science Electricity MCQ Test 3

Electricity MCQ Test 3

Name: Class:

1. In home, electrical devices are connected in

series parallel both series and parallel none of these

2. If the potential difference across each register is same, then the resistor are connected in

series parallel both series and parallel none of these

3. In an electric circuit three incandescent bulbs A, B and C of rating 40 W, 60 W and 100 W respectively are connected in parallel to an electric source. Which of the following is likely to happen regarding their brightness? [NCERT Exemplar]

Brightness of all the bulbs will be the same. Brightness of bulb A will be the maximum. Brightness of bulb B will be more than that of A Brightness of bulb C will be less than that of B.

4. Two LED bulbs of 12 W and 6 W are connected in series. If the current through 12 W bulb is 0.06 A the current through 6 W bulb will be [CBSE 2023]

0.04 A 0.06 A 0.08 A 0.12 A

5. 6 ohm and 12 ohm resistors are connected in parallel. This combination is connected in series with a 10 volt battery and 6 ohm resistor. What is the potential difference between the terminals of the 12 ohm resistors? [NTSE]

14 V 16 V 10 V 4 V

6. In normal use a current of 3.5 A flows through a hair dryer. Choose a suitable fuse from the following

3 A 10 A 5 A 35 A

7. If the current I through a register is increased by 100% (assume that temperature remains unchanged), the increase in power dissipated will be [NCERT Exemplar]

100% 200% 300%s 400%

8. The resistance of a resistor is reduced to half of its initial value. If other parameters of the electrical circuit remain unaltered, the amount of a produce in the register will become [CBSE 2023]

four time two times half one fourth

9. An electric kettle consumes 1 kW of electric power when operated at 220 V. A fuse wire of what rating must be used for it? [NCERT Exemplar]

1 A 2 A 4 5 A

10. A heating unit of an electric stove is rated at 880 W. It is connected to a power supply of 220 V, the current it will consume

2 A 4 A 6 A 8 A