What can be the difference between the specific resistance for a thin and thick wire made of the same material ?
What can be the difference between the specific resistance for a thin and thick wire made of the same material ?
The specific resistance of a thin and thick wire will be same.
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$(a)$ Name an instrument that measures electric current in a circuit. Define the unit of electric current.
$(b)$ What do the following symbols mean in circuit diagrams ?
$(c)$ An electric circuit consisting of a $0.5\, m$ long nichrome wire $XY,$ an ammeter, a voltmeter, four cells of $1.5\, V$ each and a plug key was set up.
$(i)$ Draw a diagram of this electric circuit to study the relation between the potential difference maintained between the points $X$ and $Y$ and the electric current flowing through $XY.$
$(ii)$ Following graph was plotted between $V$ and.$I$ values What would be the values of $V / I$ ratios when the potential difference is $0.8 V, 1.2 V$ and $1.6 V$ respectively ? What conclusion do you draw from these values ?
$(a)$ Name an instrument that measures electric current in a circuit. Define the unit of electric current.
$(b)$ What do the following symbols mean in circuit diagrams ?
$(c)$ An electric circuit consisting of a $0.5\, m$ long nichrome wire $XY,$ an ammeter, a voltmeter, four cells of $1.5\, V$ each and a plug key was set up.
$(i)$ Draw a diagram of this electric circuit to study the relation between the potential difference maintained between the points $X$ and $Y$ and the electric current flowing through $XY.$
$(ii)$ Following graph was plotted between $V$ and.$I$ values What would be the values of $V / I$ ratios when the potential difference is $0.8 V, 1.2 V$ and $1.6 V$ respectively ? What conclusion do you draw from these values ?
An electric appliance draws a current of $0.4\, A$ when the voltage is $200$ volt. Calculate the amount of charge flowing through it in one hour.
An electric appliance draws a current of $0.4\, A$ when the voltage is $200$ volt. Calculate the amount of charge flowing through it in one hour.
What will happen to the current in a circuit, if its resistance is doubled ?
What will happen to the current in a circuit, if its resistance is doubled ?