Electric Circuit and Circuit Diagram

Q.

in a uniform electric field if a charge is fired in a direction different from the line of electric field then the trajectory of charge will be

1. circle

2.straight line

3. parabola

4.ellipse

Q.

What are open circuits and closed circuits?

Q.

What is a circuit diagram? Draw the labeled diagram of an electric circuit comprising of a cell, a resistor, an ammeter, a voltmeter and a closed switch (or closed plug key). Which of the two has a large resistance: an ammeter or a voltmeter?

Q. A non conducting rod of length 2.2m carries a negative charge of 3.810 is to -7 spread uniformly over its length. What is The magnitude of electric field near the mid point of the rod at a perpendicular distance 3.6mm from the rod

Q.

What is electric current fuse rating??.....explain...

Q.

What is the resistance of an ideal voltmeter and ideal ammeter?

Q.

What is multimeter

Q.

A NPN transistor conducts when-

1. Both collector and emitter are positive with respect to the base
2. Collector is positive and emitter is negative with respect to the base
3. Collector is positive and emitter is at same potential as the base
4. Both collector and emitter are negative with respect to the base

Q. Why is current constant for resistors connected in series and voltage constant for resistors connected in parallel?

Q.

What is the conventional direction of electric current? How does it differ from the direction of flow of electrons?

Q.

Compare how an ammeter and a voltmeter are connected in a circuit.

Q.

How is voltmeter connected in the circuit to measure potential difference between two points?

Q.

A cell of e.m.f. $\epsilon$ and internal resistance r sends current 1.0 A when it is connected to an external resistance 1.9 $\Omega$ but it sends current 0.5 A when it is connected to an external resistance $3.9\Omega$. Calculate the values of $\epsilon$ and r.

Q.

What is the use of a plug key in the circuit?

Q.

Two resistors of resistance $4\Omega$ and $6\Omega$ are connected in parallel to a cell to draw current 0.5 A from the cell.
(a) Draw a labelled diagram of the arrangement.
(b) Calculate the current in each resistor.

Q.

Draw a circuit diagram of an electric circuit containing a cell, a key, an ammeter, a resistor of $2\Omega$ in series with a combination of two resistors ($4\Omega$ each) in parallel and a voltmeter across the parallel combination. Will the potential difference across the $2\Omega$ resistor be the same as that across the parallel combination of $4\Omega$ resistors? Give reason.

Q.

The function of voltmeter in an electric circuit is _________.

Q.

An electrician is carrying out some repairs in your house. He wants to replace a fuse with a piece of wire. Would you agree? Give reasons for your response.

Q.

Why should the resistance of:
(a) an ammeter be very small?
(b) a voltmeter be very large?

Q. Define electricity ?

Q.

What is an electric switch?

Q.

When the two identical bulbs are connected in parallel they glow with same brightness there as when they are connected in series they again Glow with Same brightness explain

Q. Is potential drop same as potential difference or voltage?

Q. Question 1
What does an electric circuit mean?

Q.

Which statement is /are correct?
1. An ammeter is connected in series in a circuit and a voltmeter is connected in parallel.
2. An ammeter has a high resistance.
3. A voltmeter has a low resistance.

Q. If 3 bulbs are connected in series with a battery then which will glow first?

Q.

Three incandescent bulb of 100 W each are connected in series in a circuit. In another circuit, another set of threee bulbs of the same wattage are connected in parallel to the same source. Will the bulb in the two circuits glow with the same brightness? Justify your answer.

Q. Why voltmeter is not connected in series.

Q.

Draw circuit symbols for (a) fixed resistance (b) variable resistance (c) a cell (d) a battery of three cells (e) an open switch (f) a closed switch.

Q.

Why voltmeter is connected in parallel across two points in the circuit to measure the potential difference?