MCQ
When the velocity of body is variable, then
- AIts speed may be constant
- BIts acceleration may be constant
- CIts average acceleration may be constant
- ✓All of these
If velocity is changing they may change in magnitude or direction or both.
$(i)$ So, if velocity is changing in direction only the magnitude is constant so speed is constant.
$(ii)$ If only direction of velocity is changing and magnitude is constant then acceleration will also be constant in magnitude (in case of uniform circular motion).
$(iii)$ Average acceleration may be constant. $a_{ av }=\frac{v_2-v_1}{t_2-t_1}$
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$R_1 = 3 \Omega \pm 1\%$ and $R_2 = 6 \Omega \pm 2\%$ When they are connected in parallel, the percentage error in equivalent resistance is.......... $\%$