English

Choose the Correct Alternative and Rewrite the Following Sentence. When the Resistance of a Conductor Increases, the Current Will ________ Increase. - Science and Technology 1

Advertisements
Advertisements

Question

Choose the correct alternative and rewrite the following sentence.

When the resistance of a conductor increases, the current will ________ increase.

Options

  • increase

  • decrease

  • remain the same

  • None of the the above.

MCQ

Solution

decrease 

According to Ohm’s law, the resistance of a conductor is inversely proportional to the current flowing through it.

shaalaa.com
  Is there an error in this question or solution?
2016-2017 (March)

RELATED QUESTIONS

Calculate the number of electrons constituting one coulomb of charge.


 In which direction does conventional current flow around a circuit?


Which of the following equation shows the correct relationship between electrical unit? 

1A = 1C/s or 1c= 1A/s 


What is an electric current?


What Makes an Electric Current Flow in a Wire?


(a) With the help of a circuit diagram, obtain the relation for the equivalent resistance of two resistances connected in parallel.
(b) In the circuit diagram shown below, find:

(i) Total resistance.
(ii) Current shown by the ammeter 


If a charge of 420 C flows through a conducting wire in 5 minutes what is the value of the current?


A switch is not touched with wet hands while putting it on or off. Give a reason for your answer.

How does an alternating current differ from the direct current?

Many electrical appliances and circuits are earthed grounded. What is the reason for this?

Are switches connected in the neutral or live wire?

The circuit diagram (Fig.) shows a battery of e.m.f. 6 volts and internal
resistance of 0.8 Ω oonnected in series. Find the
(a) Current reoorded by the ammeter,
(b) P.d. across the terminals of the resistor B,
( c) Current passing through each of the resistors B, C and D, and
( d) P.d. across the terminals of the battery.


Electrical appliances have voltage and power ratings as listed below. Which
has the larger working resistance?

Appliances Voltage (V) Power (W)
(a) Washing machine 250 3000
( b) Television 240 160
(c)240 240 1500
( d) Hair curler 250 20
( e) Car head lamp 12 36

A wire is passed through a piece of cardboard as shown in fig .. An electric current flows vertically down the wire and then flows back up. The two sections of the write are observed to repel each other.
(a) Wi th the aid of a diagram, describe how you would plot the magnetic field lines on the card .

(b) Sketch the magnetic field patterns around both the sections of the wire. Use your sketch to explain why the two sections repel each other.
(c) The repulsive force between the two sections is small. What changes could be made to increase it?


Fig . shows the core of a transformer and i ts input and output connections 

State the material used for the core and describe th e structure of the core.
(a) Use the values given in the diagram to calculate the turns ratio for the transformer and connections, labeling all parts of the diagram .
(b) If a current of 2 A is taken from th e output, calculate th e current in the input circuit (Assume the transformer to be ideal ).


Transformers are usually designed so that their efficiency is as close to 100% as possible. Describe two features in transformer design which help to achieve high efficiency?

MCB is used to protect household electrical appliances.


For current to flow, one needs art open circuit.


A charge of 400C flows through a conductor for 13 minutes and 20 seconds. Find the magnitude of the current flowing through the conductor.


What does the direction of current convey?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×