Physics - Class X - Chapter No.16 - Questions And Answers

ELECTRICITY


IMPORTANT QUESTIONS OF PAST PAPERS:


1)  Define
    (i) Direct Current (2009)
    (ii) Ampere (2011)
(iii) Volt (2011)
    (v) Farad (2011)
    (vi) ohm  (2011)
    (vii) Alternative current (2012)
    (viii) Electric field (2012)
    (ix)  electrostatic induction (2012)
2)  State(define) and explain  Coulomb's Law derive the equation
(2009, 2012) OR
   ◾   State Coulomb's Law Write down its equation. Mention the value of K in S.I units. (2018)
3)   Write down any three characteristics of resistance. (2009)
4)  What is an electric capacitor? Write down three factors  upon which its capacity depends. (2010) OR
    ◾ Define the capacity of a capacitor depend (2012)
5)  Derive the relation W = I2Rt (2012) (TIP: Joule's law)
6)  Write down any three characteristics of resistance connected in parallel? (2012)
7)  State the following
     (i) Coulomb's law (2013, 2017)
     (ii) Ohm's law (2013, 2017) and
     (iii)Joule's law (2013) OR
    ◾ State Joule's law and derive equation W= I2Rt (2019) 
8)  Define electrostatic induction in four steps with the use of two metal spheres? (2015)
9)  Define primary cell and write its four examples. (2017)
10) Write down the three characteristics of the resistance joined in series and draw the
labeled diagram of series resistance? (2008)

Numerical:
1)  Find the potential difference between two ends of a conductor if its resistance is 5 ohms and a current of 500 milliampere is passing through it. (2009)   ( Hint: Formula ; V=IR)
2)  A 100 - watt bulb operates in a 220 v circuit; Find the current through the bulb. (2010) ( Hint: Formula ; P = VI or I= P/V;  and  V=IR or R = V / I)
3)  Calculate amount of current passing through an electric heater if It takes 1800 C of charge to heat in 3 min.(2011)  ( Hint:  Formula ;  I= q /t )
4)  Find the resistance of an electric bulb, if 0.6 A current is passing through the bulb and the potential difference across the bulb is 90 Volts. (2012, 2017)  ( Hint: Formula ; V=IR)
5)  Three resistance of 4Ω, 6Ω and 12Ω are connected in parallel with a source of  6 volt. Find the current flowing through the circuit.(2013)  ( Hint:  Formula ;    1/ R e = 1 / R 1 + 1 / R 2 +1 / R 3   and  V=IR)
6)  Calculate the amount of work done in carrying a charge of +2.5Õ¾C from A to B. If A is a potential of -60 V and B is at 10 V. (2014)   ( Hint:  Formula ; W= Vq)
7)  A parallel circuit contains 80 (ohms) heater and 20 (ohms) element. What will be the current passing through circuit if it is driven by a voltage of 80 volts. Also find the equivalent resistance. (2015)  Hint:  Formula ;    1/ R e = 1 / R 1  + 1 / R 2   and  V=IRe)
8)  Calculate the current of electric heater, If 1800 coulomb charge passes through it in 3 minutes. (2016)   ( Hint:  Formula ;  I =  q/ t )
9)  Tw0 resistance of 4Ω and 6Ω are connected in parallel and then joined to a source having an emf of  12 volt. Find the value of equivalent resistance of the circuit and the total current flowing through the circuit.(2018) ( Hint:  Formula ;    1/ R e = 1 / R 1  + 1 / R 2   and  V=IRe)
10) An electronic heater has a resistance of 20 Ohm, woris at a potential difference of 220 volts. Find the current passing through the heater and the power. (2019) (Hint: Formula: V=IR, P=VI)

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