Advertisements
Advertisements
प्रश्न
An ammeter placed in series with an electric radiator reads 0.5 amps and a voltmeter placed across it reads 230 volts. What is the resistance of the radiator?
उत्तर
Using Ohm's law, R = `"V"/"I"`
`= 230/0.5`
R = 460 Ω
APPEARS IN
संबंधित प्रश्न
How should the two resistances of 2 ohms each be connected so as to produce an equivalent resistance of 1 ohm?
The resistors R1, R2, R3 and R4 in the figure given below are all equal in value.
What would you expect the voltmeter A, B and C to read assuming that the connecting wires in the circuit have negligible resistance?
State Ohm’s law and draw a neat labelled circuit diagram containing a battery, a key, a voltmeter, an ammeter, a rheostat and an unknown resistance to verify it.
In the circuit shown in the figure, find the total resistance of the circuit and the current in the arm AD.
State and define Ohm’s law.
State the limitations of Ohm’s law.
State macroscopic form of Ohm’s law.
What is ohmic device?
The voltage - current readings of a certain material are shown in the table given below:
| Voltage (V) | 10 V | 20 V | 30 V |
| Current (I) | 2 A | 3 A | 4 A |
Study the table.
- State whether the conductor used is ohmic or non-ohmic.
- Justify your answer.
- State Ohm's law.
