Advertisements
Advertisements
Question
Explain with the help of a diagram how does 'short circuiting' occur in an electric kettle.
Advertisements
Solution
APPEARS IN
RELATED QUESTIONS
The work done in moving a unit charge across two points in an electric circuit is a measure of:
(a) current
(b) potential difference
(c) resistance
(d) power
An electric bulb of resistance 20 Ω and a resistance wire of 4 Ω are connected in series with a 6 V battery.
Draw the circuit diagram, and calculate:
(a) total resistance of the circuit.
(b) current through the circuit.
(c) potential difference across the electric bulb.
(d) potential difference across the resistance wire.
A 5 V battery is connected to two 20 Ω resistors which are joined together in series.
(a) Draw a circuit diagram to represent this. Add an arrow to indicate the direction of conventional current flow in the circuit.
(b) What is the effective resistance of the two resistors?
(c) Calculate the current that flows from the battery?
(d) What is the p.d. across each resistor?
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?
How does the heat H produced by a current passing through a fixed resistance wire depend on magnitude of current I?
An electric current flowing in a wire creates ______ around the wire.
State whether the current is a scalar or vector?
- What is meant by electric current?
- Name and define its unit.
- Which instrument is used to measure the electric current? How should it be connected in a circuit?
Conventionally, the direction of the current is taken as:
Electric current passes through a metallic conductor due to the movement of ______.
