The β of a transistor may be determined directly from the

The β of a transistor may be determined directly from the curve plotted between—

1. V_CE and I_C keeping I_Bconstant
2. V_CE and I_B keeping I_C constant
3. V_CE and I_E keeping I_B constant
4. V_B and I_E keeping V_CE constant

The β of a transistor may be determined directly from the curve plotted between V_CE and I_C, keeping base current, I_B constant.