हिंदी

A Battery and Three Lamps Are Connected as Shown: - Science

Advertisements
Advertisements

प्रश्न

A battery and three lamps are connected as shown: 

 

Which of the following statements about the currents at X, Y and Z is correct?
(a) The current at Z is greater than that at Y.
(b) The current at Y is greater than that at Z.
(c) The current at X equals the current at Y.
(d) The current at X equals the current at Z. 

 

Advertisements

उत्तर

(b) The current at Y is greater than that at Z.
This is so because Y alone will offer less resistance.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 1: Electricity - Exercise 5

APPEARS IN

लखमीर सिंग Physics (Science) [English] Class 10
अध्याय 1 Electricity
Exercise 5 | Q 40

वीडियो ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्न

What actually travels through the wires when you switch on a light?


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


Why should the resistance of: 

a voltmeter be very large?


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. 

(a) Which circuit would have the highest voltage across each bulb?


Consider the circuit given below: 

 

(a) In which circuit are the lamps dimmest?
(b) In which circuit or circuits are the lamps of equal brightness to the lamps in circuit (i)?
(c) Which circuit gives out the maximum light?  


Draw a circuit diagram showing two electric lamps connected in parallel together with a cell and a switch that works both lamps. Mark an â’¶ on your diagram to show where an ammeter should be placed to measure the current.


In which of the following cases more electrical energy is consumed per hour?

(i) A current of 1 ampere passed through a resistance of 300 ohms.
(ii) A current of 2 amperes passed through a resistance of 100 ohms. 

 


The rating of a fuse connected in the lighting circuit is:
(a) 15 A (b) 5 A (c) 10 A (d) Zero


State two differences between the e.m.f and terminal voltage of a cell. 


Match the pairs.

‘A’ Group  ‘B’ Group 
1. Free electrons a. V/R 
2. Current b. Increases the resistance in the circuit 
3. Resistivity c. Weakly attached 
4. Resistances in series d. VA/LI

Is electric potential a scalar or a vector physical quantity?

An electric kettle is rated 3 kW, 250 V. Give reason whether this kettle can be used in a circuit which contains a 13 A fuse.

Where is the main fuse in a house circuit connected?

Tick(✓) the correct choice in the following:

24 watt, 12 volt head lamp is fully lit by connecting it to a 12 volt
battery. The working resistance of the lamp is


Why is an ammeter always connected in series while the voltmeter always in parallel to a circuit across which voltage is to be measured?

An electric bulb is marked '100 W, 250 V'. What information does this convey?


An electric bulb is rated at 220 V, 100 W.

  1. What is its resistance?
  2. What safe current can be passed through it?

State whether the following statement is True or False:

The SI unit of charge is the coulomb. 


Which of the following represents voltage?


Electric current passes through a metallic conductor due to the movement of ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×