NDA PHYSICS SECTIONAL Test - 2

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Question 1:

Three resistors of 1 ohm, 2 ohm and 3 ohm are connected in parallel combination. The total resistance of the three resistors should be –

Question 2:

The parallel combination is preferred over the series combination due to which of the following reasons?

Question 3:

Four resistances of 16 ohms each are connected in parallel. Then the equivalent of such four resistances is connected in series. What would be the total resistance?

Question 4:

You are given one hundred 1Ω resistors. What is the largest resistance you can make in a circuit using these?

Question 5:

A resistor of 8 ohms is connected in parallel with another resistor X. The resultant resistance of the combination is 4.8 ohms. What is the value of the resistor X ?

Question 6:

Two resistances when connected in parallel give resultant value of 2 ohm; when connected in series the value becomes 9 ohm. Calculate the value of each resistance.

Question 7:

A 4 Ω coil and a 2 Ω coil are connected in parallel. A total current of 3 A passes through the coils. What current passes through the 2 Ω coil ?

Question 8:

In the circuit diagram given below five resistances of 10 Ω, 40 Ω, 30 Ω, 20 Ω and 60 Ω are connected as shown to a 12 V battery. Calculate the total resistance in the circuit.

Question 9:

A wire is 1.0 m long, 0.2 mm in diameter and has a resistance of 10 Ω. Which of the following is the resistivity of its material ?

Question 10:

How much work is done in moving a charge of 2 C across two points having a potential difference of 12 V ?

Question 11:

If the potential difference between the end of a wire of fixed resistance is doubled, by how much does the electric power increase?

Question 12:

What is the maximum number of different electrical combinations possible with three equal resistances?

Question 13:

The resistivity of a wire depends on which of the following?

Question 14:

A Galvanometer can be converted into a voltmeter by –

Question 15:

Which of the following are good conductors of electricity?

Question 16:

Which of the following is the frequency of alternating current in India?

Question 17:

An electric bulb has a thin wire called-

Question 18:

An electric generator works on the principle of-

Question 19:

The direction of magnetic field around a current carrying metallic wire is given by- 

Question 20:

Galvanometer is used to detect the presence of which of the following ?