Components and Symbols

Q. Which of the component represents the rheostat in the given circuit?

1. $D$
2. $E$
3. $F$
4. $A$

Q.

Why does voltmeter have high resistance?

Q.

Select the correct option:

Statement 1: Following figure represents the switch in ‘ON’ position.

Statement 2: When switch is in ‘ON’ position current does not flow through the circuit.

1. Statement 1 is true and Statement 2 is false.

2. Statement 1 is false and Statement 2 is true.

3. Both statements are false.

4. Both statements are true.

Q.

An electric immersion heater is switched on for$8minutes$. The heat supplied by it raises the temperature of $500g$ of water from $10°C$to $60°C$. Calculate the power of the heater in watts. [Specific heat of water$=\text{4.2}{\mathrm{Jg}}^{-1}{}^{\circ }\mathrm{C}^{-1}$]

Q. Identify the component $A$ in the given circuit.

1. Voltmeter
2. Ammeter
3. Rheostat
4. Cell

Q.

For the following devices:

I: Fuse

II: Electric Bulb

III: Electric Bell

Select the correct option.

1. I and II work on the principle of heating effect of current.

2. I and III work on the principle of magnetic effect of current.

3. II and III work on the principle magnetic effect of current.

4. III works on the principle heating effect of current.

Q.

inside bulb which gas is present?

Q. Which of the following represents the symbol for a series combination of cells?

1. 
2. 
3. 
4. 

Q. The device which can directly measure the electric potential difference between two points is / are:

1. Voltmeter
2. Ammeter
3. Galvanometer
4. Multimeter

Q.

Filament of a bulb is made up of:

1. Aluminum

2. Tungsten

3. Copper

4. Iron

Q. Four cells are fixed on a board as shown below:

How will you connect the terminals with wires to make a battery of four cells?

1. A - Q, C - D, D - P
2. P - B, R - S, Q - C
3. A - B, Q - R, C - S
4. A - B, Q - R, C - D