Ohmic and Non Ohmic Resistors

Q.

Which of the following is an ohmic resistor?

1. LED

2. Junction diode

3. Filament of a bulb

4. Nichrome wire

Q.

Choose the correct statement about non-ohmic resistor.

1. It obeys Ohm's law

2. The graph for potential difference V versus current I is not a straight line.

3. Slope of I-V curve is same at every point.

4. Copper wire is a non-ohmic resistor.

Q. Match the symbols to the corresponding components.

1. Resistor
2. Switch
3. Voltmeter

Q. Match the following based on the electrical properties of a conductor.

1. Variable resistance
2. Zero resistance
3. Increase in resistance
4. Decrease in resistance

Q.

If a metallic wire of resistance R is melted and recast to half of its length, the new resistance of the wire will be?

1. $\frac{R}{4}$
   

2. $\frac{R}{2}$
   

3. R
   

4. 2R

Q.

Which of the following is an ohmic resistors?

1. LED

2. Junction diode

3. Nichrome wire

4. Filament of a bulb

Q.

Which of the following is an ohmic resistor?

1. LED

2. Filament of a bulb

3. Nichrome wire

4. Junction diode

Q. The V-I curve of the ohmic component is:

1. Linear
2. Parabolic
3. None of the above
4. Non-linear

Q. Non-ohmic conductors do not have resistance of any kind.

1. True
2. False

Q. For which of the following resistors, V-I graph is a not a straight line?

1. Copper
2. Nichrome
3. Silicon
4. Tungsten