MCQ Questions for Class 10 Science Electricity with Answers

Q1. The temperature of a conductor is increased. The graph best showing the variation of its resistance is

Answer: a

Q2. A battery of 10 volt carries 20,000 C of charge through a resistance of 20 Ω. The work done in 10 seconds is
(a) 2 × 10₃ joule
(b) 2 × 10⁵joule
(c) 2 × 10⁴ joule
(d) 2 × 10² joule

Answer: b

Q3. A boy records that 4000 joule of work is required to transfer 10 coulomb of charge between two points of a resistor of 50 Ω. The current passing through it is
(a) 2 A
(b) 4 A
(c) 8 A
(d) 16 A

Answer: c

Q4. The resistance whose V-I graph is given below is

Answer: b

Q5. To get 2 Ω resistance using only 6 Ω resistors, the number of them required is
(a) 2
(b) 3
(c) 4
(d) 6

Answer: b

Q6. Two devices are connected between two points say A and B in parallel. The physical quantity that will remain the same between the two points is
(a) current
(b) voltage
(c) resistance
(d) None of these

Answer: b

Q7. Calculate the current flows through the 10 Ω resistor in the following circuit.

(a) 1.2 A
(b) 0.6 A
(c) 0.2 A
(d) 2.0 A

Answer: b

Q8. Two resistors are connected in series gives an equivalent resistance of 10 Ω. When connected in parallel, gives 2.4 Ω. Then the individual resistance are
(a) each of 5 Ω
(b) 6 Ω and 4 Ω
(c) 7 Ω and 4 Ω
(d) 8 Ω and 2 Ω

Answer: b

Q9. If P and V are the power and potential of the device, the power consumed with a supply potential V₁ is

Answer: c

Q10. A fuse wire repeatedly gets burnt when used with a good heater. It is advised to use a fuse wire of
(a) more length
(b) less radius
(c) less length
(d) more radius

Answer: d