Current Electricity Objective Question In English

Current Electricity Objective Question In English | Class 12 Physics Objective Question | Class 12 Physics Chapter 3 Current Electricity MCQs | Current electricity objective questions class 12

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Current Electricity Objective Question In English

1. The specific resistance of conductor increase with

• (A) increase of temperature
• (B) increase of cross-sectional area
• (C) decrease of the cross-sectional area
• (D) decrease in length

2. Which one of the following is the best material for making connecting wires?

• (A) Nichrome
• (B) Tungsten
• (C) Copper
• (D) Manganese

3. Fuse-wire is made of which material ?

• (A) Copper
• (B) Tungsten
• (C) Lead-Tin Alloy
• (D) Nichrome

4. Three resistors of resistance Reach are combined in various ways. Which of the following cannot be obtained ?

• (A) 3R
• (B) 2R/4
• (C) R/3
• (D) 2R/3

5. If on increasing the temperature, resistance decreases then it is

• (A) Superconductor
• (B) Semiconductor
• (C) Insulator
• (D) None

6. You are given three resistances each of one ohm. The maximum resistance that can be obtained by their combination is

• (A) 1 ohm
• (B) 1/2 ohm
• (C) 2 ohm
• (D) 3 ohm

7. The resistance of an ideal voltmeter is

• (A) infinite
• (B) zero
• (C) 500 Ω
• (D) None

8. The resistance of an ideal ammeter is

• (A) infinite
• (B) zero
• (C) 500 Ω
• (D) very long

9. The SI unit of temperature co-efficient of resistivity is

• (A) Ω mK^-1
• (B) K^-1
• (C) Ω^-1
• (D) Sm^-1

10. If the temperature is increased by 3°C, the value of temperature co-efficient of resistivity.

• (A) increases
• (B) decreases
• (C) remains almost the same
• (D) none

11. A heater is rated as 1000W, 230V. Its resistance is

• (A) 22.9 Ω
• (B) 32.9 Ω
• (C) 42.9 Ω
• (D) 52.9 Ω

12. The Kirchhoff’s point rule obeys the principle of conservation of

• (A) energy
• (B) charge
• (C) momentum
• (D) mass

13. The property of a circuit that converts electrical energy into thermal energy is called,

• (A) resistance
• (B) current
• (C) voltage
• (D) electromotive force

14. The electrical appliances in our houses are connected across supply switch in

• (A) series
• (B) parallel
• (C) mixed grouping
• (D) none

15. Negative charges flow from

• (A) low to high potential
• (B) high to low potential
• (C) independent of potential where
• (D) none

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Current Electricity Objective Question In English | Class 12 Physics Objective Question