English
Maharashtra State BoardSSC (English Medium) 10th Standard

When the Resistance of a Conductor Increases, the Current ____________ .

Advertisements
Advertisements

Question

When the resistance of a conductor increases, the current ____________ .

Options

  • increases

  • decreases

  • remains the same

  • increases or decreases
MCQ
Advertisements

Solution

When the resistance of a conductor increases, the current decreases.

shaalaa.com
  Is there an error in this question or solution?

APPEARS IN

RELATED QUESTIONS

When the current is switched on through a wire, a compass needle kept nearby gets deflected from its north-south position. Explain.


An electric bell has an electromagnet. 


Do you think an electromagnet can be used for separating plastic bags from a garbage heap? Explain.


Which effect of current can be utilised in detecting a current carrying wire concealed in a wall? 


Fill in the following blank with suitable words:

 If a coil is viewed from one end and the current flows in an anticlockwise direction, then this end is a ........... pole.


Fill in the following blank with suitable words: 

 If a coil is viewed from one end, and the current flows in a clockwise direction, then this end is a ........... pole.


The magnetic effect of current was discovered by:

(a) Maxwell
(b) Fleming
(c) Oersted
(d) Faraday


For the coil in the diagram below, when the switch is pressed:

(a) what is the polarity of end A?
(b) which way will the compass point then?    


Which way does the wire in the diagram below  tend to move? 

 


When the switch S is closed in the figure given below, the pointer of the galvanometer moves to the right.  

 

If S is kept closed, will the pointer:

(a) return to zero?
(b) stay over on the right?
(c) move to the left and stay there
(d) move to and fro until S is opened


A coil is connected to a galvanometer. When the N-pole of magnet is pushed into the coil, the galvanometer deflected to the right. What deflection, if any, is observed when: 

the magnet is a rest in the coil? 


If fuse of 250 mA, 500 mA, 1 A, 5 A and 10 A were available, which one would be the most suitable for protecting an amplifier rated at 240 V, 180 W?  


What is the function of a split ring in an electric motor?


Draw magnetic field lines produced around a straight current carrying conductor passing through a cardboard. How will the strength of the magnetic field change when the point where magnetic field is to be determined is moved away from the conductor?


Read the given passage and answer the following questions:

The home electrical connection consists of ‘live’, ‘neutral’ and ‘earth’ wires. The ‘live’ and the ‘neutral’ wires have potential difference of 220 V. The ‘earth’ is connected to ground. Due to a fault in the equipment or if the plastic coating on the ‘live’ and the ‘neutral’ wires gives a way the two wires come in contact with each other and a large current flows through it producing heat. If any inflammable material (such as wood, cloth, plastic, etc.) exists around that place it can catch fire. Therefore a fuse wire is used as a precautionary measure.

  1. Name the two wires having potential difference of 220 V.
  2. What is a short circuit?
  3. Write the function of a fuse.

What is that instrument which can detect the presence of electric current in a circuit?


Unscramble the following words:

HTRCO


As shown in the diagram an aluminium rod 'AB' is suspended horizontally between the two poles of a strong horse shoe magnet in such a way that the axis of rod is horizontal and the direction of the magnetic field is vertically upward. The rod is connected in series with a battery and a key.

State giving reason:

  1. What is observed when a current is passed through the aluminium rod from end B to end A?
  2. What change is observed in a situation in which the axis of the rod 'AB' is moved and aligned parallel to the magnetic field and current is passed in the rod in the same direction?

Using an electromagnet, you can make a working model of a railway signal as shown in figure.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×