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संबंधित प्रश्न
Compare how an ammeter and a voltmeter are connected in a circuit.
What is the conventional direction of the flow of electric current? How does it differ from the direction of flow electrons?
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?
Calculate the effective resistance between the points A and B in the network shown below in Figure 8.45
In the network shown in the following adjacent Figure, calculate the equivalent resistance between the points.
- A and B
- A and C
The following circuit diagram shows three resistors 2 Ω, 4 Ω and R Ω connected to a battery of e.m.f 2V and internal resistance 3 Ω. If the main current of 0.25 A flows through the circuit, find:
- the p.d. across the 4 Ω resistors,
- the p.d. across the internal resistance of the cell,
- the p.d. across the R Ω or 2 Ω resistors, and
- the value of R.
A fuse is a short piece of wire of high ______ and low ______.
At the time of short circuit, the electric current in the circuit ______.
Which part of an electrical appliance is earthed?
