CBSE Class 10 Physics Question Bank

 Section : A

Q.1. Two charged batteries A and B are at potential – 30 and + 20 V respectively and they are connected by a connecting wire. The current

(i) Will flow from A to B (ii) Will flow from B to A

(iii) Will not flow at all

Q.2. The work done in moving a positive charge across two points in an electric circuit is a measure of

(i) Current (ii) Potential difference

(iii) Resistance (iv) Power

Q.3. 1 coulomb = ____________ electrons

(i) 1.6 × 10 – 19 (ii) 9.1 × 10 – 31

(iii) 6.25 × 10 – 18 (iv) None of these

Q.4. The unit of specific resistance is

(i) Ohm metre (ii) Ohm

(iii) Volt (iv) Ampere

Q.5. Most metals are good conductors of electricity because they have

(i) Large number of molecules

(ii) Large number of free electrons

(iii) A shiny surface

(iv) A low temperature

Q.6. A wire is cut into half. Its resistivity

(i) Also becomes half

(ii) Becomes double

(iii) Remains same

(iv) Depends upon thickness of the wire

Q.7. 1 volt of potential difference is equal to

(i) 1 coulomb per joule (ii) 1 joule

(iii) 1 joule per coulomb (iv) 1 ampere

Q.8. In a resistance box the resistances are connected in

(i) Series (ii) Parallel

(iii) Neither of two (iv) Both (i) and (ii)

Q.9. For ohmic resistors, the graph between V and I is

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