Electricity Class10 CBSE - MCQ test 1

Q1. The number of electrons constituting 10C of charge?

6.25x10^24

6.25x10^18

6.25x10^25

6.25x10^19

Q2. Which of the following is not true about the electric charge?

Charge on body is always integral of charge on electron.

Charge is ascaler quantity.

Net charge on an isolated system ia always conserved.

Charge can be converted into energy & vice versa.

Q3. A current of 0.5A is drwan by a filament of electric bulb for 60 seconds.What will be the amount of electric chage is flowing through the circuit?

3 C

30 C

300 C

None

Q4.The workdone in moving a charge of 2 C across two points in circuit having Potential difference of 12V is?

24

42

32

None of these

Q5.The workdone in moving an electric chage "q" in a circuit does not depends on

The mass of the charge

the potential differenace between the points₂

The magnitude of charge

All of the above

Q6. Charge is a vector Physical quantuty.

True

False

No change

None of these

Q7. Which of the following substances offer very low resistance?

Silver

Copper

Iron

Gold

Q8.Ohm's Law eastablishes relation between -----------.

Rasistance & current

Potential difference & current

Charge & current

None of these

Q9. Rate of flow of charge in a wire accross any crossectional area is called current.

False

True

Oxalic acid

Formic acid

Q10. A 50 Joule of work must be done to move an electric charge of 2C from a point,Where potential is 10V to another point where potential is V volt .What is the value of V?

5V

10V

-15V

15V

Q11. What is being measured using the voltmeter?

current in the circuit

voltage in the circuit

voltage across the resistor

resistance offered by the resistor

Q12. A circuit has a charge of 2C moving through it in 3 s. Which electrical component in the circuit, if present, will show the current?

Voltmeter will show a current of 6 A.

Ammeter will show a current of 0.66 A.

Rheostat will show a current of 0.7 A.

Resistor will show a current of 0.35 A.

Q13. Electrical resistivity of a given metallic wire depends upon

its length

its area of cross-section

its material

All of these

Q14. What is the relationship between resistance and current?

They are directly related to each other.

They are inversely related to each other.

The resistance has a greater magnitude than current.

The current has a greater magnitude than resistance.

Q15. A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross section of the filament in 16 seconds would be roughly

10^20

10^15

10^8

10^2

Q16.Which of the following represents voltage?

Work done / Current×Time

Work done × Charge

Work done×Time / Current

Work done × Charge × Time

Q17. Insulators have :

No resistance

High resistance

Small resistance

Variable resistance

Q18. When electric current is passed, electrons move from:

High potential to low potential

Low potential to high potential

Do not move

Out of the conductor

Q19. In an electric circuit an ammeter is always connected in......

series

parallel

mixed

none of the above

Q20. Ohm’s law states that:

Resistance increases as current increases

Resistance decreases as current increases

Resistance increases as voltage increases

Current increases as voltage increases