Advertisements
Advertisements
प्रश्न
If the current passing through a conductor is doubled, what will be the change in heat produced
Advertisements
उत्तर
If the current passing through a conductor is doubled, the heat produced will increase by four times because the heat produced is directly proportional to the square of the current
APPEARS IN
संबंधित प्रश्न
Choose the correct alternative and rewrite the following sentence.
When the resistance of a conductor increases, the current will ________ increase.
Which of the two is connected in series : ammeter or voltmeter?
A student made an electric circuit shown here to measure the current through two lamps.
Are the lamps in series or parallel?
(a) Are the lamps in series or parallel?
(b) The student has made a mistake in this circuit. What is the mistake?
(c) Draw a circuit diagram to show the correct way to connect the circuit. Use the proper circuit symbols in your diagram.
The figure given below shows an electric circuit in which current flows from a 6 V battery through two resistors.
- Are the resistors connected in series with each other or in parallel?
- For each resistors, state the p.d. across it.
- The current flowing from the battery is shared between the two resistors. Which resistor will have bigger share of the current?
- Calculate the effective resistance of the two resistors.
- Calculate the current that flows from the battery.
You can given one hundred 1 Ω resistors. What is the smallest and largest resistance you can make in a circuit using these?
Ten bulbs are connected in a series circuit to a power supply line. Ten identical bulbs are connected in a parallel circuit to an identical power supply line.
(b) In which circuit, if one bulbs be brighter?
Which effect of current is utilised in an electric light bulb?
State the S.I. unit of current.
Calculate the equivalent resistance between A and B in the adjacent diagram.
Tick(✓) the correct choice in the following:
The outer casing of an electric iron is generally connected to earth in order
to
What is the purpose of a fuse in an electrical circuit?
An electric iron is rated 750 W, 230 V. Calculate the electrical energy consumed by the press in 16 hours.
A bulb marked 12 V, 24 W operates on a 12 V battery for 20 minutes. Calculate:
- The current flowing through it, and
- The energy consumed.
How is direction of current related to the direction of flow of electrons?
State expression for Cells connected in series.
State the conditions for the flow of charge in a circuit from one point to the other.
MCB is used to protect household electrical appliances.
Calculate the current in a wire if a charge of 1500 coulomb flows through it in 5 minutes.
Common sources of Direct Current (DC) are:
