Current Electricity (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 56 - 59 of 77

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2142 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

Question number: 56

» Current Electricity » Potentiometer

MCQ▾

Question

In given figure, the potentiometer wire AB has a resistance of 5 Ω and length 10 m. What is the balancing length AM for the emf of 0.4 V?

Circuit diagram of potentiometer with balance point M

Circuit Diagram of Potentiometer With Balance Point M

Here figure shows the circuit diagram of potentiometer with balance point M. battery of 5V connected with resistor R and a key.

Choices

Choice (4) Response

a.

4 m

b.

0.4 m

c.

8 m

d.

0.8 m

Question number: 57

» Current Electricity » Series and Parallel Combinations of Resistors

MCQ▾

Question

How can we convert the galvanometer of Equation and current Equation into Ammeter with maximum range of 6A.

Choices

Choice (4) Response

a.

By adding a resistance 2.5mΩ in series with the galvanometer

b.

By adding a resistance 6mΩ in series with the galvanometer

c.

By adding a resistance 6mΩ . in parallel with the galvanometer

d.

By adding a resistance 2.5mΩ in parallel with the galvanometer

Question number: 58

» Current Electricity » Resistances of Different Materials

MCQ▾

Question

A heater coil connected to a supply of a 220 F is dissipating some power P 1. The coil is cut into half and the two halves are connected in parallel. The heater now dissipates a power P 2. The ratio of power P 1: P 2 is

Choices

Choice (4) Response

a.

1: 4

b.

1: 2

c.

2: 1

d.

4: 1

Question number: 59

» Current Electricity » Wheatstone Bridge

MCQ▾

Question

In the circuit shown in the figure, the current flowing in 2Ω, resistance

 Bridge circuit consists of four resistors and a galvanometer.

Bridge Circuit Consists of Four Resistors and a Galvanometer.

Figure shows the bridge circuit with 10Ω, 2 Ω, 5 Ω and 25 Ω resistors. Current of 1.4 A is passing in circuit.

Choices

Choice (4) Response

a.

1.0A

b.

1.2 A

c.

1.4A

d.

0.4 A

f Page
Sign In