Advertisements
Advertisements
प्रश्न
Write the SI units for:
(a) Electric current
(b) Potential difference
(c) Charge.
Advertisements
उत्तर
(a) Ampere
(b) Volt
(c) Coulomb
APPEARS IN
संबंधित प्रश्न
Define watt. Write down an equation linking watts, volts and amperes.
A bulb is rated as 250 V; 0.4 A. Find its : (i) power, and (ii) resistance.
A current of 0.2 A flows through a wire whose ends are at a potential difference of 15 V.
calculate:
(i) the resistance of the wire and
(ii) the heat energy produced in 1 minute.
A battery of e.m.f 15 V and internal resistance 2 Ω is connected to two resistors of resistance 4 ohm and 6 ohm joined in series. Find the electrical energy spent per minute in 6 ohm resistor.
The diagram below shows a magnetic kept just below the conductor AB which is kept in North South direction.
(i) In which direction will the needle deflect when the key is closed ?
(ii) Why is the deflection produced ?
(iii) What will be the change in the deflection if the magnetic needle is taken just above the conductor AB ?
(iv) Name one device which works on this principle.
What is the energy conversion when an electric current passes through a metallic wire?
If the rating of an electric bulb is 100W – 230V, Explain its meaning.
What is the function of the split rings in a d.c. motor?
1 kWh = ____________
